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In page 1540:

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* Georg Joachim Rheticus publishes De libris revolutionum Copernici narratio prima in Danzig, an abstract of Copernicus' as yet unpublished De revolutionibus orbium coelestium, and the first printed publication of Copernican heliocentrism.

  • Europe is hit by a heat wave and drought lasting for about seven months. Rivers such as the Rhine and Seine dry up, and many people die from dysentery and other illnesses, caused by lack of safe drinking water.[2] However, this year's vintage from Würzburger Stein and other vineyards is particularly notable.[3]
  • Martin Luther expels theologian Caspar Schwenckfeld from Silesia.